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Drill bit. From top: Spade, brad point, masonry, and twist drills bits. Drill bit (upper left), mounted on a pistol-grip electric drill. A set of masonry drills. A drill bit is a cutting tool used in a drill to remove material to create holes, almost always of circular cross-section. Drill bits come in many sizes and shapes and can create ...
- Twist Drill Bit
- Masonry Drill Bit
- Auger Drill Bit
- Glass Drill Bit
- Step Drill Bit
- Countersink Drill Bit
- Self-Centering Drill Bit
- Tile Drill Bit
- Spade Bit
- Square Drill Bit
Drill bits of the “twist” variety are generally thought of as being general purpose in nature, due to their ability to bore holes in a wide variety of materials. Bits of this configuration typically feature 118-degree tips and are constructed of HSS (High-Speed Steel). Though twist drill bits can be used on a variety of materials, they are seldom t...
Also known as: concrete drill bit, hammer drill bit Masonry bits are designed to penetrate through concrete, brick, and block. Bits of this type feature a blunt Tungsten Carbide tip, which is brazed or welded in place. Masonry drill bits are typically used in conjunction with a hammer drill, and penetrate by use of crushing power, rather than cutti...
Auger drill bits are intended for use in low-speed, high-torque applications, and can be used in conjunction with a power drill or brace (by-hand). These bits feature a screw thread at their outer tip, which is followed by a much larger, knurled segment. Auger bits are also known to produce extremely clean holes.
Glass drill bits feature a spear-shaped head, which is designed to bore through glass without causing a fracture. Care should be taken when using a bit of this nature, as glass bits often wander until a hole has been established. This can lead to a marring of glass surfaces.
Step drill bits are conical in shape, and graduated in diameter, allowing users to quickly bore holes to a defined size. Bits of this type can also be used to clean out holes cut with various alternate types of drill bits.
Countersink drill bits are used to create a recess for a screw head to sit within. Countersink drill bits come in numerous configurations, including star, rose, and snail. The majority of such bits also feature a hexagonal shaft, allowing for expedited change out.
Also known as:door hinge bit Self-centering drill bits feature a chamfered drill guide which can be used to provide perfect alignment when drilling pilot holes for hinges, handles, and other trim accessories. The guide itself is centered around a drill bit contained within, leaving little room for error when drilling into door frames. Simply insert...
Tile drill bits are relatively similar to those bits used when attempting to drill through glass. Tile bits take on a spear shaped appearance and are used to bore out holes of varying sizes. However, tile bits can create irregularly shaped holes, when too much pressure is applied during the cutting process.
Spade bits, also known as paddle bits, are used when it is necessary to drill large holes in wood. Spade bits can drill holes as large as 1 ½ inches in diameter. The spade bit is held in position by the sharp point in the center of the bit, thus allowing perfect circles to be cut.
Square drill bits are yet another variant of the traditional mortising bit. These bits feature a spiral-shaped auger, contained within a hollow chisel-like shell. When operated in a drill press or mortising machine, square drill bits simultaneously puncture and core wooden surfaces, leaving behind an expertly squared hole.
DRILL BIT definition: 1. the long sharp part of a drill (= a tool or machine that makes holes) that spins around and cuts…. Learn more.
Drill Bit – SHANK. The shank end of the drill bit is the end by which the bit is held and driven. Common Shank Types: 3-Flatted Shank - Generally 3 flats designed to allow a strong chuck grip on the shank. Reduces the possibility of the drill slipping in the chuck during tough drill applications. Reduced Shank - Usually 1/4", 3/8", or 1/2 ...
- Twist Bit. This is the most basic type of drill bit that often comes packed with a drill itself. Twist bits are easy to recognize based upon their cylindrical shank and loose corkscrew shaft.
- Step Drill Bit. A step drill bit is conical in shape and looks like a dull arrowhead with stair steps cut into to the untrained eye. However, in practice, these unique drill bits allow a user to gradually increase the size of an existing hole without needing to attach a new drill bit.
- Forstner Bit. Forstner bits, named after Benjamin Forstner who first patented the design, are bits that are suitable for making relatively large flat-bottom holes.
- Masonry Bit. On the surface, a masonry bit looks like a twist bit with a similar shank and shaft. However, these bits instead feature a hexagonal tip that makes them ideal for drilling through brick, concrete, and stone when used in a hammer drill.
noun. (Extractive engineering: Field development, Equipment) A drill bit is a tool used to cut or crush rock. With rotary drilling, a hole is drilled by the continuous turning of a drill bit. The drill bit is the mechanism that cuts into the ground layers to reach the gas deposit or to cut a core sample. A drill bit is a tool used to cut or ...
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Feb 23, 2023 · A drill bit is a specialized tool used to create holes in materials like wood, metal, and plastic. It consists of a cylindrical shank, point, and cutting edges. The shank is the part that fits into the drill, while the point and cutting edges are designed to create the hole.
